<template>
  <div>
    <input type="text" v-model="user.name" />
    <input type="text" v-model="user.age" />
  </div>
</template>

<script>
// 目标: 侦听对象
export default {
  data() {
    return {
      user: {
        name: "",
        age: 0,
      },
    };
  },

  /*
		语法:
		  watch: {
		    变量名 (newVal, oldVal){
		      // 变量名对应值改变这里自动触发
		    },
			
		    变量名: {
		      handler(newVal, oldVal){},
		      deep: true, // 深度侦听(对象里面层的值改变)
		      immediate: true // 立即侦听(网页打开handler执行一次)
		    }
		  }
		*/
  watch: {
    user: {
      deep: true,
      handler(newVal) {
        console.log(newVal);
      },
      immediate: true,
    },
  },
};
</script>

<style>
</style>
